Endeavour's farewell tour

In this handout provided by NASA, workers pose for a photograph on the wing of NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour mated on top, at the NASA Kennedy Space Center, Shuttle Landing Facility on Sept. 18, 2012, in Cape Canaveral, Fla. The SCA, a modified 747 jetliner, will fly Endeavour to Los Angeles where it will be placed on public display at the California Science Center. This is the final ferry flight scheduled in the Space Shuttle Program era.

Credit: Bill Ingalls/NASA

NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour bolted on top takes off from the Shuttle Landing Facility runway at NASA Kennedy Space Center on Sept. 18, 2012, in Cape Canaveral, Fla.

Credit: Bill Ingalls/NASA

NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour bolted on top takes off from the Shuttle Landing Facility runway at NASA Kennedy Space Center on Sept. 19, 2012, in Cape Canaveral, Fla.

Credit: Bill Ingalls/NASA

NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour bolted on top takes off from the Shuttle Landing Facility runway at NASA Kennedy Space Center on Sept. 19, 2012, in Cape Canaveral, Fla.

Credit: Bill Ingalls/NASA

In this handout provided by NASA, NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour bolted on top is airborne after taking off from the Shuttle Landing Facility runway at NASA Kennedy Space Center on Sept. 19, 2012, in Cape Canaveral, Fla.

Credit: Bill Ingalls/NASA

NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour bolted on top is airborne after taking off from the Shuttle Landing Facility runway at NASA Kennedy Space Center on Sept. 19, 2012, in Cape Canaveral, Fla.

NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour bolted on top flies over Cocoa Beach along with a Pathfinder aircraft and a T-38 chase plane on Sept. 19, 2012, in Cocoa Beach, Fla.

Credit: Bill Ingalls/NASA

Jorgen and Ruth Sabinsky watch as NASA's Shuttle Carrier Aircraft, or SCA, with the space shuttle Endeavour bolted on top flies over Cocoa Beach Pier on Sept. 19, 2012, in Cocoa Beach, Fla.

Credit: Bill Ingalls/NASA

NASA's Shuttle Carrier Aircraft, with Space Shuttle Endeavour bolted on top, lands in California after a three day farewell tour.

Credit: NASA TV

Former Rep. Gabrielle Giffords and her husband Mark Kelly watched as the Shuttle Endeavour came into view over Tucson, Sept. 20, 2012.

Credit: P.K. Weis/Southwest Photo Bank

Former Rep. Gabrielle Giffords and her husband Mark Kelly watched as the Shuttle Endeavour came into view over Tucson, Sept. 20, 2012.

Credit: P.K. Weis/Southwest Photo Bank

NASA's Shuttle Carrier Aircraft with the space shuttle Endeavour securely mounted on top touches down at Edwards Air Force Base after third leg of its four-segment final ferry flight from the Kennedy Space Center in Florida to Los Angeles International Airport on Sept. 20, 2012.

Credit: NASA

Space Shuttle Endeavour, strapped to the back of NASA's Shuttle Carrier Aircraft, flies low over the California dessert on Sept. 21, 2012.

Credit: Lori/UGC/CBS

The space shuttle Endeavour makes a pass over San Francisco before making its final landing in Los Angeles on September 21, 2012 in San Francisco, California. The Space Shuttle Endeavour will be placed on public display at the California Science Center.

Credit: Ezra Shaw/Getty Images

A spectator takes a photo of the Space Shuttle Endavour as it flies on top of a modified 747 jumbo jet over the Golden Gate Bridge while traveling to Los Angeles on September 21, 2012 in Sausalito, California. The Space Shuttle Endeavour did a 4-1/2 hour tour over California landmarks before heading to Los Angeles International Airport where it will be prepared to be moved to its new permanent home at the California Science Center in downtown Los Angeles.

Credit: Justin Sullivan/Getty Images

The Space Shuttle Endavour flies on top of a modified 747 jumbo jet over the Golden Gate Bridge as it travels to Los Angeles on September 21, 2012 in Sausalito, California.

Credit: Justin Sullivan/Getty Images

Space Shuttle Endeavour mounted on NASA's Shuttle Carrier Aircraft, passes over the Golden Gate Bridge in San Francisco, Friday, Sept. 21, 2012. Endeavour is making a final trek across the country to the California Science Center in Los Angeles, where it will be permanently displayed.

Credit: AP Photo/Marcio Jose Sanchez

Endeavour, on top of NASA's Shuttle Carrier Aircraft or SCA, flies over the Griffith Park Obervatory on September 21, 2012 in Los Angeles, California. The space shuttle Endeavour did a 4-1/2 hour tour over California landmarks before heading to Los Angeles International Airport where it will be prepared to be moved to its new permanent home at the California Science Center in downtown Los Angeles.

Credit: Sandy Huffaker/Getty Images

The Space Shuttle Endeavour atop a modified 747 passes the Hollywood Sign as seen from Dodger Stadium, Friday, Sept. 21, 2012, in Los Angeles, the last aerial hurrah before retiring to a Los Angeles museum.

Credit: AP Photo/Mark J. Terrill

Space shuttle Endeavour, sitting on top of NASA's Shuttle Carrier Aircraft or SCA, flies near the Hollywood sign on September 21, 2012 in Los Angeles, California.

Credit: Karl Walter/Getty Images

Endeavour, sitting on top of NASA's Shuttle Carrier Aircraft or SCA, lands at Los Angeles International Airport on September 21, 2012 in Los Angeles, California. The Space Shuttle Endeavour will be placed on public display at the California Science Center.

Credit: Kevork Djansezian/Getty Images

The retired space shuttle Endeavour is seen in an airport hangar at LAX being prepared for its 12-miles trip to the California Science Center.

Credit: KNX/CBS

Space shuttle Endeavour is seen atop the Over Land Transporter vehicle after exiting Los Angeles International Airport, on its way to its new home at the California Science Center in Los Angeles, Friday, Oct. 12, 2012. Endeavour, built as a replacement for space shuttle Challenger, completed 25 missions, spent 299 days in orbit, and orbited Earth 4,671 times while traveling 122,883,151 miles. Beginning Oct. 30, the shuttle will be on display in the CSC's Samuel Oschin Space Shuttle Endeavour Display Pavilion.

Credit: AP Photo/Bill Ingalls, NASA

Spectators take pictures as the space shuttle Endeavour is pulled by a Toyota Tundra pickup truck on its way across the 405 freeway in Inglewood, Calif., Friday, Oct. 12, 2012. Endeavour's 12-mile road trip kicked off shortly before midnight Thursday as it moved from its Los Angeles International Airport hangar en route to the California Science Center.

Credit: AP Photo/Patrick T. Fallon

The space shuttle Endeavour makes its way down Manchester Blvd. over a closed 405 fwy in Inglewood, Calif., Friday, Oct. 12, 2012. Endeavour's 12-mile road trip kicked off shortly before midnight Thursday as it moved from its Los Angeles International Airport hangar en route to the California Science Center, its ultimate destination.

Credit: AP Photo/Chris Carlson

Space shuttle Endeavour passes a "Welcome Home" sign as it begins its journey to its permanent home in Los Angeles in the early morning hours Oct. 12, 2012, at Los Angeles International Airport.

Credit: AFP/Getty Images

The space shuttle Endeavour enters the Westchester neighborhood of Los Angeles in the early hours of October 12, 2012, on a two-day trek across the city to the California Science Center, where it will go on permanent display.

Credit: Pool

Spectators gather to watch the space shuttle Endeavour outside of Randy's Donuts as it waits to cross the 405 freeway in Inglewood, Calif., Friday, Oct. 12, 2012. Endeavour's 12-mile road trip kicked off shortly before midnight Thursday as it moved from its hanger at Los Angeles International Airport to the California Science Center.

Credit: AP Photo/Patrick T. Fallon

Space shuttle Endeavour slowly moves through city streets on a 160-wheeled carrier in Los Angeles, Friday, Oct. 12, 2012. Endeavour's 12-mile road trip kicked off shortly before midnight Thursday as it moved from its Los Angeles International Airport hangar en route to the California Science Center, its ultimate destination.

Credit: AP Photo/Jae C. Hong

Space shuttle Endeavour is slowly moved along a city street October 12, 2012 in Los Angeles, California.

Credit: Mark J. Terrill-Pool/Getty Images

Space shuttle Endeavour is seen en route from Westchester Square to Randy's Donuts during its final ground journey in Los Angeles, California on October 12, 2012.

Credit: JOE KLAMAR/AFP/Getty Images

Spectators gather to watch the space shuttle Endeavour make its way down Manchester Blvd. in Los Angeles, Friday, Oct. 12, 2012. Endeavour's 12-mile road trip kicked off shortly before midnight Thursday as it moved from its Los Angeles International Airport hangar en route to the California Science Center, its ultimate destination.

Credit: AP Photo/Chris Carlson

The space shuttle Endeavour began its 12-mile trek at 2-mph through Los Angeles on its way to retirement at the Science Center.

Credit: CBS News

Spectators get a glimpse of the space shuttle Endeavour on route from Westchester Square to Randy's Donuts during its final ground journey in Los Angeles, California on Oct. 12, 2012.

Credit: AP Photo/JOE KLAMAR

The space shuttle Endeavour is transported to the California Science Center in Exposition Park from Los Angeles International Airport on October 12, 2012 in Los Angeles, California.

Credit: Kevork Djansezian/Getty Images

Space shuttle Endeavour is seen en route from Westchester Square to Randy's Donuts during its final ground journey in Los Angeles, California on October 12, 2012. Over the next two days, the 170,000-pound shuttle will travel at 2 mph along a 12-mile route from LAX to its final home at the California Science Center.

Credit: JOE KLAMAR/AFP/Getty Images

Technicians prepare to change the transporter system for the Space Shuttle Endeavour as it travels on its final journey to its permanent museum home, October 12, 2012 in Los Angeles, California. Over the next two days, the 170,000-pound shuttle will travel at 2 mph along a 12-mile route from LAX to its final home at the California Science Center.

Credit: ROBYN BECK/AFP/Getty Images

Space Shuttle Endeavour makes its way down Manchester Blvd. in Inglewood, Calif., Saturday, Oct. 13, 2012. Over two days, it will trundle 12 miles at a top speed of 2 mph to its final destination, the California Science Center where it will be the centerpiece of a new exhibit.

Credit: AP Photo/Los Angeles Newspaper Group, Jeff Gritchen

The space shuttle Endeavour makes a turn at an intersection as it is transported on the second of its two-day trek to the California Science Center, October 12, 2012 in Inglewood, California.

Credit: Kevork Djansezian/Getty Images

A detail of the tiles on the underside of Space Shuttle Endeavour as it arrives at the Forum en route to the California Science Center on October 13, 2012 in Inglewood, California. Endeavour is on its last mission - a 12-mile creep through city streets, past an eclectic mix of strip malls, mom-and-pop shops, tidy lawns and faded apartment buildings.

Credit: Jeff Gritchen-Pool/Getty Images

The space shuttle Endeavour squeezes through a neighborhood lined with apartment buildings as it is transported to the California Science Center from Los Angeles International Airport (LAX), October 12, 2012 in Inglewood, California.

Credit: Kevork Djansezian/Getty Images

The space shuttle Endeavour is moved to the California Science Center, Saturday, Oct. 13, 2012 in Los Angeles.